docs: def sharedcontent_exists(slug):
      """
      Return `True` if shared content with the given slug name exists.
  
      This filter makes it possible to conditionally include shared content with
      surrounding markup only when the shared content item actually exits, and
      avoid outputting the surrounding markup when it doesn't.
  
      Example usage:
  
          {% load icekit_tags sharedcontent_tags %}
  
          {% if "shared-content-slug"|sharedcontent_exists %}
          <div class="surrounding-html">
              {% sharedcontent "shared-content-slug" %}
          </div>
          {% endif %}
      """
      from django.contrib.sites.models import Site
      from fluent_contents.plugins.sharedcontent.models import SharedContent
      site = Site.objects.get_current()
      return SharedContent.objects.parent_site(site).filter(slug=slug).exists()